WG82577LM S LGWS Intel, WG82577LM S LGWS Datasheet - Page 149
WG82577LM S LGWS
Manufacturer Part Number
WG82577LM S LGWS
Description
Manufacturer
Intel
Datasheet
1.WG82577LM_S_LGWS.pdf
(195 pages)
Specifications of WG82577LM S LGWS
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Intel
10.2.1.3.2
®
5 Series Express Chipset MAC Programming Interface—82577 GbE PHY
Receive Control Register 1 - RCTL1 (0x00104; RW)
7:0
9:8
11:10
15:12
17:16
24:18
25
26
30:27
31
Bit
RO
RW
RW
RO
RW
RO
RW
RW
RW
RO
Type
0x0
00b
00b
0x0
00b
0x0
0b
0b
0x0
0b
Reset
Reserved. This bit represents a hardware reset of the receive-related
portion of the device in previous controllers, but is no longer applicable.
Only a full device reset CTRL.SWRST is supported. Write as 0b for future
compatibility.
Receive Descriptor Minimum Threshold Size (RDMTS). The corresponding
interrupt is set each time the fractional number of free descriptors
becomes equal to RDMTS.
correspond to RDMTS values. See
RDLEN.
Descriptor Type (DTYP).
00b = Legacy or Extended descriptor type.
01b = Packet Split descriptor type.
10b and 11b = Reserved.
The value of RCTL1.DTYP should be the same as RCTL.DTYP
Reserved.
Receive Buffer Size (BSIZE).
RCTL.BSEX – zero:
00b = 2048 Bytes.
01b = 1024 Bytes.
10b = 512 Bytes.
11b = 256 Bytes.
RCTL.BSEX – one:
00b = Reserved.
01b = 16384 Bytes.
10b = 8192 Bytes.
11b = 4096 Bytes.
BSIZE is only used when DTYP – 00b. When DTYP – 01b, the buffer sizes
for the descriptor are controlled by fields in the PSRCTL register.
BSIZE is not relevant when the FLXBUF is other than zero, in that case,
FLXBUF determines the buffer size.
Reserved. Should be written with 0b.
Buffer Size Extension (BSEX).
Modifies buffer size indication (BSIZE above).
0b = Buffer size is as defined in BSIZE.
1b = Original BSIZE values are multiplied by 16.
Reserved. Should be written with 0b.
FLXBUF. Determine a flexible buffer size. When this field is 0000b, the
buffer size is determined by BSIZE. If this field is different from 0000b,
the receive buffer size is the number represented in KB.
For example, 0001b = 1 KB (1024 bytes).
Reserved. Should be written with 0b to ensure future compatibility.
Table 85
Description
Section 10.2.1.4.8
lists which fractional values
for details regarding
142
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